Glenn



Feb. 14, 1956 c. GLENN 2,734,550

FLATTENING HAMMER FOR STOVE TOP Filed Jan. 6, 1953 3 Sheets-Sheet 1 05-9 42 36 10 AIR LINE 311 MW 6 41 m 1/ A 4'? J 6 0 I INVENFOA lllll-llllII II- ATTD R N EYS Feb. 14, 1956 CQ'GLENN 2,734,550

LATTENING HAMMER FOR STQVE TOP Filed Jan. 6, 1953 3 Sheets-Sheet 2 I f4Z9 7 2:96, INVENTOR. [6:2 fig fil: (a/{19704 ATTEI RN EYE United StatesPatent-O FLATTENING HAMMER FOR STOVE TOP Carl Glenn, Dayton, OhioApplication January 6, 1953, Serial No. 329,873

' 2 Claims. (Cl. 15348) This invention relates to a metal workingapparatus, and more particularly to an apparatus or machine forhammering out wrinkles or irregularities in metal objects such as stovetops.

The object of the invention is to provide a metal shapi'ng press whichis adapted to be used for straightening out irregularities in work, suchas wrinkles or creases in stoves, whereby the necessity of removing thewrinkles by hand is eliminated.

Another object of the invention is to provide a metal shaping presswhich includes a plurality of air hammers for hammering out the wrinklesor irregularities in the work piece, there being a mechanism includinghydraulic cylinders for adjusting the position of the air hammers, therebeing a means provided for holding the work stationary while it is beingworked on.

Another object of the invention is to provide a meta 2,734,550 FatentedFeb. 14, 1956 Figure 11 is a plan view of the valve for controlling theflow of air to the air cylinders.

Figure 12 is an elevational view of another modification.

Figure 13 is a plan view of the machine shown in Figure. l2.

Figure 14 is an elevational view of still another modified metal workingmachine.

Figure 15 is a top plan view of the machine shown in Figure v14, withparts broken away and in section.

Figure 16 is a longitudinal sectional view taken through the apparatusof Figure 15.

Figure 17 is a fragmentary transverse sectional vie taken through theapparatus of Figure 15.

Figure 18 is a fragmentary sectional view showing the hydraulic cylinderfor adjusting the position of the air cylinders.

Figure 19 is a transverse sectional view showing the guides for the airhammer.

Figure 20 is a sectional view taken on the line 20-20 of Figure 18.

Figure 21 is a sectional view showing one of the guide members.

Figure 22 is a side elevational view showing one of the supportingmembers. V

Figure 23 is a fragmentary plan view showing a further modification ofthe invention.

working press which may be mounted on a work bench or other supportingstructure whereby bulges, creases and the like may be removed from sucharticles as stoves, wash basins, tubs, automobile body parts, and othermetal articles, the present invention enabling the wrinkles or creasesto be removed from the articles automatically whereby a great number ofthe articles can be worked on in a minimum amount of time and with aminimum amount of effort, the present invention including automaticpeening and shaping hammers.

A further object of the invention is to provide a peen hammer for astove top which is extremely simple and inexpensive to manufacture.

Other objects and advantages will be apparent during the course of thefollowing description.

' In the accompanying drawings, forming a part of this application, andin which like numerals are used to designate, like parts throughout thesame: 7

Figure 1 is a side elevational view showing the metal press of thepresent invention, with parts broken away and in section.

Figure 2 is a sectional view taken on the line 2-2 of Figure 1.

, Figure 3 is a fragmentary plan view of the metal working press, withparts broken away and in section. Figure 4 is a side elevational viewshowing a portion of a stove from which the wrinkles are to be hammeredor emoved.

Figure 5 is a perspective view of the stove showing the wrinkles to beremoved. Figure 6 is a fragmentary elevational view of a modified metalpress. Figure 7 is a fragmentary plan view showing a portion of theapparatus of Figure 6.

Figure 8 is a sectional view showing the hydraulic cylinder foradjusting the position of the air hammers.

Figure 9 is a sectional view taken on the line 9-9 of Figure 8. I.Figure 10 is a sectional viewtaken'through the hydraulie valve.

Referring in detail to Figures l-5 of the drawings, the numeral 30designates a portion of a table or other'supporting structure, andmounted on the table 30 is a base 31. The base 31 includes a verticalportion 32, and a horizontal portion 33, Figure 2, there being a recess34 in the end of the horizontal portion 33 for a purpose to be laterdescribed.

The machine of the present invention further includes a stationarytrame35 which supports a movable body member 36 that has a block 37 connectedthereto. The numeral 38 designates a portion of a stove which has beenformed in a suitable press from a flat piece of metal, Figure 5. Thus,the stove section 38 may be used to form a gas stove or other type ofstove and the stove 38 includes a top section 39 which is adapted to bearranged contiguous to the uppersurface of the horizontal portion 33 ofthe base 31. The stovesection 38 further includes aback section 40 whichabuts the vertical portion 32 of the base and the 'stove section furtherincludes side portions or sections 41. which are provided with aplurality of wrinkles or creases. These wrinkles are shown in Figure 5in the side section 41 and these wrinkles occur during the process offorming the stove section 38 on a suitable press.

t is the purpose of the present invention to provide a means forautomatically flattening the side sections 41 so as to remove thewrinkles therefrom without the necessity of removing the wrinkles byhand which is a laborious and time consuming process. 1

A means is provided for holding the stove section 38 immobile while itis being worked on, and this means comprises a casing 44 which extendsfrom the block- 37 so that as the block 37 moves the casing 44 willbemoved. Positioned in the casing 44 is a coil spring 43, and the coilspring 43 abuts one end of a plunger'42 and normally urges the plunger42to its. outward position so that it will engage the top section 39 ofthe stove section 38 to maintain the stove sections immobile while thewrinkles are being hammered therefrom.

The numeral 45 in Figures 1 and 3 designates each of a plurality of airhammers, and a conduit 46 is connected to the air cylinders 45 forconveying air under pressure thereto. It will be seen that a pair of theair cylinders 45 are arranged on each side of the base 31; and thecylinders 45 may be supported in a suitable bracket 47. A rod 48 isslidably or-reciprocably arranged m mbein each of the cylinders 45, therods 48 may be connected to a suitable piston arranged within thecylinders 45. A hammer 49 is mounted on the outerend of each of the rods48, and the hammers 49 are adapted to hammer the wrinkled side portions41 against the sides of the base 31 in order to smooth out the sidesections 41. Thus, the stove section 38 will be free of wrinkles and canbe used in completing the finished product. Suitable guide pins 50extend rearwardly from each of thehammers 49, and the guide pins 50 mayextend through an upstanding apertured bar 51.

The numeral 52 designates a control valve which is adapted to be usedfor-controlling the flow of compressed to the cylinders 45. An inletline 54 leads to the valve 52 and the line 54 leads from a suitable.source of supply. A lever 53. is. provided for rotating the rotor withinthe valve 52, and a line 55 serves to convey compressed air from thevalve 52 to the cylinders 45. A coil spring 56- has one end connected tothe lever 53, and the other end of the coil spring 56 is connected tothe frame by means of a securing element such as a pin 57.

There is further provided a solenoid 58 which has an electric line 59connected thereto. An electric Inc 60 also leads from the solenoid 58,and the line 60 leads to a stationary contact 61. A movable contact 62is mounted for movement into and out of engagement with the stationarycontact 61, and the contact 62 is mounted on a flexible arm 63. A bar 64is carried by the body member 36, so that as the body member 36 movesforwardly, the bar 64 will force the contact 62 into engagement with thecontact 61 in order to complete the electric circuit leadingto thesolenoid 58. This will withdraw the arm of the solenoid inside thesolenoid coil, and it will be noted that the outer end of the arm 65 ispivotally connected to the, lever 53, Figure 1. Thus, as the solenoid58'. is energized by the forward movement of the body member 36, thevalve 52 will be moved to its open position so. that air will beadmitted to the cylinders 45 whereby the hammers 49 will be slammedagainst the wrinkled side portions 41 of the stove section 38 to therebyflatten or smooth out the wrinkled side sections 41. After the bodymember 36 has returned to its rearward position, as shown in Figure 1,the bar 64 will permit the flexible arm 63 to spring away so that thecontact 62 will move away from the contact 61 whereby the solenoid 58will no longer be energized. Thus, the spring 56 will cause the valve52. to move tov its closed position so that no additional air will besupplied tothe cylinders 45 for moving the h mmers, 49 against the stovesection 38. A suitable bleed port can be arranged in the valve 52 topermit the to.- be bled from the cylinders 45.

The bodyxrnernber 3.6 may be reciprocated by any suitable mechanism.

Referring to Figures 6l1 ofthe drawings, there is shown a modified formofthe invention wherein a hydraulic cylinder is provided for shifting oradjusting the position of the air cylinders 45 so that the position ofthe cylinders 45 can be controlled as desired. Thus, in Figurev 6, thenumerals 36 and 37 designate the body memher and block respectivelywhich have the same function aspreviously described. Also, althoughthere is only shown one pair of the air cylinders 45 on one side of thebase 31, it is to be understood that there is another pair of 'the aircylinders 45 on the other side of the base 3.1 for hammering out thewrinkles in the stove section 3.8. The solenoid 58 is adapted to beenergized when the body member- 36 moves downwardly since the bar 64will move the contact 62 into engagement with the contract 61 and whenthe solenoid 58 is energized the arm 65 will be pulled upwardly insidethe solenoid coil 58. There is, provided the valve 52 for controllingthe flow of cone pressed air to and from the aircylinders 45. Thehydrauliccylinder is indicated bythe numeral 66', and a ofhoses 67' and.69 lead from opposite ends of the cylinder 66'. The hose 67 leads to aconduit 68, while and the inner end of each of,

. th hos 62 l a s. to condui 70- Ihe c0n ui s68 and.

1 sure from a suitable source'of supply to the valve 71.

The valve 71 is conventional and includes a stationary casing 74 havinga rotor 75 therein. A lever 76 may have one end connected to the rotor75, and the other end of the lever 76 may be connected to the solenoidbar 65 by means of a pivot pin 77. The rotor 75 is provided with a pairof curved passageways 78 and 79 so that the various conduits leading tothe valve can be opened and closed upon rotation of the rotor 75.

The hydraulic cylinder 66 has a plunger or piston 85 slidably mountedtherein, and a stem 80 is connected to the piston 85. A link 81 extendstransversely from the. rod 80, and the link 81 is secured to a. slidingblock '82, the block 82 being slidably positioned in a housingBIi,Figures 7, 8 and 9. The block 82 has formed integral therewith abracket84 and, mounted in the bracket 84 is the pair of air cylinders 45. Thus,as hydraulic fluid is introduced into the cylinder 66, the piston 85will reciprocate therein whereby the bracket 84 will move back and forthso that the position of the air cylinders 45 can be adjusted-relative tothe base 31.

The modification shown in Figure 6 is used in substantially the samemanner as the previously described form of the invention. Thus, the bodymember 36 may be reciprocated in any suitable manner, and as thebodymember 36 moves downwardly, the bar 64 will. causethe contacts 61and 62 to become engaged with each other so that the solenoid 58 will beenergized. This will cause the bar 65 to be pulled into the solenoid 58so that the valves 52 and 71 will be simultaneously actuated. Thus,hydraulic fluid will be permitted to flow into the cylinder 66 to movethe air cylinders 45 to-. ward the base 31 which has the wrinkled workpiece 38 thereon. At the same. time, the air hammers 49 will be actuatedto thereby bang out or straighten out the wrinkled portions 41 of thestove section 38.. When the body member 36 returns to its normalposition as shown in Fi ures 1 or 6, the circuit leading to the solenoid58, is opened so that the spring 56 pulls the bar 65 out of the solenoid58 whereby the valves 52 and 71 are moved to the position shown inFigure 6. Referring to Figures 12 and 13 of the drawings, there is shownanother modification wherein the numeral, 86 designates a work bench.Mounted on the bench 8,6. is a base 87, and the base 87 may be securedto. the. bench 86 in any suitable manner, as for example by bolt and nutassemblies 89. The base 87 is adapted to support a work piece such asthe wrinkled stove section 4.1 which is to be straightened. A bracket 88is connected tothe bench 86 by suitable bolt and nut assemblies 89, andvan air cylinder 45 is supported in the bracket 88. A stem 48 extendsfrom the air cylinder 45, and the usual air hammer 49 is mounted on theouter end of the stem 48, the hammer 49 being mounted for. movement intoand out of engagement with the work piece 41.

As previously stated, the horizontal portion 33. oi the base 31 isprovided with a recess 34, Figure- 2. A cam member 90 is movably mountedadjacent the recess .34, and the cam member 90 abuts the end portion 92of the top 39 of the stove, section 38. Depending from the block 37 is acooperating cam member 91 so. that when the, bodymember 36 and block 37move toward thev base 31, the cam 91. will engage the cam 90 to move the.cam 90 towards. the. base 31 whereby the end portion 92 of the stovesection 38 will be bent into the recess 34 to. properly form this.portion of the stove section. Reierring to Figures 14-22-there is shownanother modified form of the invention. In this form of the inventionthe numeral 93 designates a portion of a supporting bench or table,while the numeral 94 designates a portion of a stove section which is tohave its wrinkles 95 removed, the stove section 94 including sidesections 96 and an end section 97, Figure 15. A pair of movable bars 98are adapted to engage the inner surfaces of the side sections 96 so asto clamp the stove section 94 in an immobile position while the wrinkles95 are being removed. For guiding the bars 98 during their movement, aguide strip 99 extends from each of the bars 98, and the guide strips 99are mounted for sliding engagement into casings 100,

.the casings 100 being secured to the bench 93 in any suitable manner,as for example by bolt and nut assemblies 101. A moving block 102 ispositioned between the pair of blocks 98.

The moving block 102 has a plurality of links 105 pivotally connectedthereto by securing elements 103, and the links 105 are connected to thelaterally movable bars 98 by means of securing elements 104, Figure 15.A cylinder 106 may be connected to a suitable source of hydraulic fluidor air under pressure and the cylinder 106 serves to actuate a stem orrod 107 which is connected to the block 102. The air cylinders are againindicated by the numeral 45, and the cylinders 45 serve to actuate thehammers 49 which act upon the side sections 96 to re move the wrinkles95 therefrom. Guide pins 50 extend rearwardly from each of the hammers49 for guiding the hammers during their reciprocating movement. Foradjusting the position of the air cylinders 45, the hydraulic cylinder108 is provided. The hydraulic cylinder 108 actuates a rod 109 which isconnected to a bracket 111 by means of a pin 110, Figure 18. The bracket111 supports the pair of air cylinders 45 so that as the hydrauliccylinder 108 is actuated, the position of the air cylinders 45 can beshifted on the bench 93. For guiding the air cylinders 45 during theirshifting or adjustment, a pair of arms 112 extend from the lower end ofthe bracket 111, and the arms 112 are slidably positioned in slots orguideways arranged in a block 114 which is secured to the bench 93 bysuitable securing elements such as screws 115, Figures 19 and 20.

Referring to Figmre 23 there is shown another modified form of clampingthe stove section so that it can be worked on by the hammers 49 withoutthe work accidentally shifting. Thus, in this form of the inventionthere is shown a cylinder 116 which may be connected to air or hydraulicfluid, and the cylinder 116 operates a rod 117 which has teeth 118formed thereon. The teeth 118 are arranged in meshing engagement with agear wheel 119 which is mounted on an end of a shaft 120. A pair of arms125 serve to connect the shaft 120 to links 121, and the links 121 areconnected to laterally movable bars 122. Thus, when the bars 122 are intheir expanded position, that is when they are in their positionfurthest away from each other, the stove section such as the stovesection 94 will be clamped in place. For guiding the bars 122 duringtheir lateral movement toward and away from each other, guide members123 are secured to the bars 122, the guide members 123 being slidablymounted in casings 124.

When using the form of the invention shown in Figures 14-22, the aircylinders 45 and hydraulic cylinder 106 can be actuated in any suitablemanner. The stove section 94 will be securely clamped between the pairof bars 98 when the bars 98 are in their expanded position, thisexpansion being caused by the hydraulic cylinder 106 being actuated.Then, when the hammers 49 are actuated, the hammers 49 will hammeragainst the wrinkled portion 95 to thereby automatically remove thewrinkles from the stove section. After the wrinkles have been removed,the hydraulic cylinder 106 can be reversed so that the rod 107 will movethe block 102 from the solid line position shown in Figure 15 to thedotted line position therein whereby the bars 98 will he moved slightlytoward each other so that the stove section 94 can be.

readily removed and replaced by the next stove section to be workedupon.

The mechanism shown in Figure 23 illustrates another modified means ofclamping the work piece such as the stove section 94. Thus, by actuatingthe cylinder 116, the intermeshing gears 118 and 119 will cause rotationof the shaft whereby the bars 122 will expand to clamp or lock the workpiece so that suitable air hammers can be used to remove wrinkles fromsuch a work piece.

From the foregoing, it is apparent that a fully automatic peening hammerand forming tool has been provided. The present invention is especiallysuitable for removing wrinkles from stove tops which are beingmanufactured. As shown in Figure 1 the apparatus is assembled on a presswhich is already in existence, while the device shown in Figures 12, I3and 14 may be mounted on a suitable table or bench. The members 45 areconventional air hammers which go back and forth continuously to removethe wrinkles from the work piece.

I claim:

1. A machine for handling stove sections comprising a table, a basesupported on said table and including a horizontally disposed portionand a vertically disposed portion, said base adapted to support a stovesection thereon, said stove section including side sections havingwrinkles therein, a movable body member mounted for movement towards andaway from said base, a block connected to said body member, a casingextending from said block, a plunger reciprocably arranged in saidcasing and adapted to hold the stove section immobile while the stovesection is being worked on, a coil spring positioned in said casing andabutting said plunger, a pair of cylinders arranged on each side of saidbase, a hammer extending outwardly from each of said cylinders andactuated thereby, conduits for connecting said cylinders to a source ofair under pressure, a valve arranged in said conduits for controllingthe flow of air to said cylinders, a solenoid adapted to be connected toa source of electrical energy for controlling said valve, and an armconnected to said body member for selectively energizing said solenoid.

2. In a machine for removing wrinkles and creases from stove sections, abench, means on said bench for supporting a stove section, said meanscomprising a pair of spaced parallel bars mounted for movement towardsand away from each other, a block interposed between said pair of bars,links connecting said block to said bars, a casing arranged contiguousto each of said bars, a guide strip connected to each of said bars andmovably positioned in said casings, said bars in their expanded positionserving to secure the stove section while the stove section is beingworked on, a pair of air cylinders movably mounted adjacent each side ofthe stove section, and a hammer extending outwardly from each of saidcylinders and actuated thereby and hydraulic cylinders for adjusting theposition of said air cylinders relative to said bench. I

References Cited in the file of this patent UNITED STATES PATENTS307,357 Tweddell et al. Oct. 28, 1884 440,051 Naylor Nov. 4, 18901,148,131 Thompson July 27, 1915 1,493,155 Hummel May 6, 1924- 1,669,543Talbert May 15, 1928 2,303,059 Misfeldt Nov. 24, 1942 2,589,629 Raymondet al Mar. 18, 1952

